A mid-ranged corrosion resistant alloy with good strength

Originally developed to combat sea water corrosion, AL6XN has expanded its role as being good mid-range corrosion resistant alloy. AL6XN studs are a low carbon, high purity, nitrogen-bearing "super-austenitic" stainless alloy. With a higher nickel and molybdenum content than Duplex 2205 and Super Duplex 2507, it delivers better corrosion resistance while giving a more cost effective alternative to nickel super alloys like Inconel or Hastelloy in moderately corrosive conditions.

Chemical ResistanceIn chemical processes which utilize chlorides, such as paper mills and waste water, stress corrosion cracking (SCC) is a common culprit for 316L stainless failures. Duplex alloys will outlast environments that will cause SCC in 316 stainless, but for more severe low PH environments, studs made from higher nickel content alloys like AL6XN will generally work better. For the most extreme situations, alloys with >45% nickel content like Hastelloy are often considered.

Outstanding Resistance to Salt WaterSeawater is where AL6XN studs outperform so many alloys providing protection to stress corrosion cracking, pitting and crevice corrosion in a broad range of marine applications. AL6XN studs contain a minimum of 6% molybdenum content and it is this addition of molybdenum that provides the greatest protection against pitting and crevice corrosion.

AL6XN Applications• Desalination plants depend on AL6XN studs for the salt water corrosion protection• Pulp bleaching equipment and piping • The power industry uses AL6XN studs where salt water and chlorides are present such as steam surface condensers, supercritical, high pressure, feed water heaters, steam surface condensers, flue-gas desulfurization equipment and in nuclear power water piping • Offshore • Chemical Processing - processing tanks, vessels and pipes as well as plate and frame heat exchangers.

In addition to AL6XN common threaded studs, we also offer AL6XN weld studs. This specialty fastener provides a secure, cross-sectional weld in single-sided access situations. AL6XN weld studs are available in a variety of fastener styles.